Requires RISC OS 3.5 or above. A full screen plug-in derived from my old !Noises demo, itself derived from the unix version of Cthugha. Download the latest version.  Some screenshots.

Version 1.16, 2017-06-06

• Block automatic effects change while Ctrl key is pressed.
• Modified behaviour of fish effects so that they converge on a single point on sudden volume increases.
• Added more Ying Yang type screen modes: horizontal half mirror, horizontal split in, horizontal mirror.
• Added 50% Split in encrustation.

Version 1.15, 2016-05-29

• Use tripple buffering if possible to avoid flickering on Pi machines.

Version 1.14, 2016-05-08

• ARMv8 compatibility.

Version 1.13, 2014-02-15

• Added control of relative volume with wheel mouse.

Version 1.12, 2012-03-05

• Added control of the player through the mouse.

Version 1.11, 2009-11-21

• Extended setup with 'Texts' section to show clock, title, effects on startup.
• DigitalCD_Misc messages type 5 and 6 to display temporary messages and rotate titles messages.

Version 1.08, 2009-01-22

• Modified to follow the RISC OS 6 screen handling specs.
• Fixed flashing text (RISC OS doesn't restore the correct driver screen bank when switching output back from sprite to screen).
• Broke construction of screen translation maps in small chunks to avoid tempory screen freezings.
• Added Ctrl+(Shift+F12) to control minimal effect duration.
• Fixed bug in 'Blast' flame causing crashes.
• New 'Pixel doubling' option, for use in larger screen modes.
• New 'DownSpiral' translation.

Version 1.06, 2003-03-26

• Changes to VSync synchronisation and buffer swapping.
• Changed determination of allocated screen memory for Iyonix.